Voltage converter
a voltage converter and body terminal technology, applied in the field of voltage converters, can solve the problems of inability to adjust the voltage on the body terminals of each transistor, and achieve the effects of enhancing voltage conversion efficiency, reducing the conductor resistance and the occupied area of layout, and reducing energy loss
Active Publication Date: 2012-05-22
ITE TECH INC
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Benefits of technology
[0010]The present invention provides a voltage converter, by which conducting resistance and occupied area of layout are reduced, whereby further lowers energy loss during conversion of voltages so as to enhance voltage conversion efficiency.
[0017]By providing different bias voltages (i.e., the first bias voltage, the second bias voltage, the third bias voltage and the fourth bias voltage) at the body terminal of each transistor of the voltage converter, the present invention effectively reduce the conducting resistance and the occupied area of the layout, further lowering the energy loss during the voltage conversion such that the voltage conversion efficiency is enhanced. In addition, the present invention also adjusts the bias voltage generated by each bias voltage adjustment module through the control module such that the voltage converter may achieve best voltage conversion efficiency at every operating state.
Problems solved by technology
Therefore, the voltage converters 100˜300 are unable to adjust voltages on the body terminals of each of the transistors.
Method used
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Embodiment Construction
[0029]FIG. 4A is a schematic diagram illustrating a voltage converter of an exemplary embodiment of the present invention. Referring to FIG. 4A, the voltage converter 400 includes a first transistor 410, a second transistor 420, an inductor 430 and a control module 440.
[0030]A source terminal of the first transistor 410 receives the input voltage VIN, and a body terminal of the first transistor 410 receives a first bias voltage V1. A drain terminal of the second transistor 420 is coupled to the sink terminal of the first transistor 410, a source terminal of the second transistor 420 is coupled to the ground terminal GND, and a body terminal of the second transistor 420 receives a second bias voltage V2. The inductor 430 has a first terminal coupled to the drain terminal of the first transistor 410 and a second terminal generating an output voltage VOUT. The control module 440 is coupled to a gate terminal of the first transistor 410 and a gate terminal of the second transistor 420 f...
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A voltage converter including a first transistor, a second transistor, an inductor and a control module is provided. The first transistor has a source terminal receiving an input signal, and a body terminal receiving a first bias voltage. The second transistor has a drain terminal coupled to a drain terminal of the first transistor, a source terminal coupled to ground, and a body terminal receiving a second bias voltage. The inductor has a first terminal coupled to the drain terminal of the first terminal and a second terminal generating an output voltage. The control module is coupled to a gate terminal of the first transistor and a gate terminal of the second transistor for controlling conducting states of the first transistor and the second transistor.
Description
CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims the priority benefit of Taiwan application Ser. No. 98114048, filed on Apr. 28, 2009. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of specification.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention is related to a voltage converter, and more particularly to a voltage converter for controlling a body forward bias voltage of a transistor.[0004]2. Description of Related Art[0005]Voltage converter is a voltage conversion circuit which utilizes an inductor to perform charging and discharging. The voltage converter not only has a boost converter structure but also has a buck converter and a buck / boost converter structure, and the voltage converter is one of most popular power supply devices.[0006]FIG. 1 is a schematic diagram illustrating a conventional boost voltage converter. Referring to FIG. 1, in a boost voltage c...
Claims
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IPC IPC(8): G05F1/10G05F1/40
CPCH02M1/08H03K17/063H02M3/158H03K2217/0018
Inventor CHOU, YI-CHUNG
Owner ITE TECH INC